ATP molecules labeled with 32P radioactive phosphorus at the last (third) residue of phosphoric acid were introduced into one cell, and ATP molecules labeled 32P at the first (closest to ribose) residue into another. After 5 minutes, the content of inorganic phosphate ion labeled with 32P was measured in both cells. Where did it turn out higher and why?
The phosphate ion content will be higher in the cell where ATP was labeled with the phosphoric acid residue closest to ribose, since it does not cleave during hydrolysis. In that case, the extreme residue of phosphoric acid is easily cleaved.
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